lit : a ridiculously small responsive css framework
Tailwind CSS : A utility-first CSS framework packed with classes like flex, pt-4, text-center and rotate-90 that can be composed to build any design, directly in you...
xCSS : xCSS bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades.
Pure : A set of small, responsive CSS modules that you can use in every web project.
Ink : A Responsive Email Framework from ZURB. Quickly create responsive HTML emails that work on any device & client. Even Outlook.
Ink is a set of tools for quick development of web interfaces.